Main bowl discharge actuating mechanism for carry-type scrapers



31, 1954 J. E. RICHTER 2,687,584

MAIN BOWL DISCHARGE ACTUATING MECHANISM FOR CARRY-TYPE SCRAPERS Filed May 1, 1951 6 Sheets-Sheet l INVENTOR. John E. filth/er- Z41 x pw'u Aug. 31, 1954 J. E. RICHTER 2,637,584

MAIN BOWL DISCHARGE ACTUATING MECHANISM FOR CARRY-TYPE SCRAPERS 6 Sheets-Sheet 2 Filed May 1, 1951 INVENTO John E 19/6/72?" Aug. 31, 1954 .1. E. RICHTER MAIN BOWL DISCHARGE ACTUATING MECHANISM FOR CARRY-TYPE SCRAPERS 6 Sheets-Sheet 3 Filed May 1, 1951 5 M H T 0NA mt w W T a? A n .h Y B R & ww mm mUHuw Aug. 31, 1954 .1. E. RICHTER MAIN BOWL DISCH ARGE ACTUATING MECHANISM FOR CARRY-TYPE SCRAPERS 6 Sheets-Sheet 4 Filed May 1, 1951 Aug. 31, 1954 J. E. RICHTER MAIN BOWL DISCHARGE ACTUATING MECHANISM FOR CARRY-TYPE SCRAPERS s Shets-Sheet 5 Filed May 1, 1951 INVENTOR. John E. P/c/ifer' qTTO/eA/EYS Aug. 31, 1954 J. E. RICHTER 2,687,584

MAIN BOWL DISCHARGE ACTUA'IING MECHANISM FOR CARRY-TYPE SCRAPERS Filed May 1; 1951 6 Sheets-Sheet 6 INVENTOR. John E P/ch/er Patented Aug. 31, 1954 UNITED STATES TENT OFFICE MAIN BOWL DISCHARGE ACTUA'IING MECH- ANISM FOR CARRY-TYPE SCRAPERS Application May 1, 1951, Serial No. 223,903

' bowl or front apron, and having means for adjusting the front apron, for adjusting the height of the cutting blade and for discharging the load.

The object of the present invention is to provide equipment of the above character having improved means for discharging a lead from the main bowl. The improved means as characterized by the fact that it eliminates the use of operating cables or like means positioned in such 2 Claims. (Cl. 37-425) a manner as to obstruct the top of the main bowl,

thus facilitating loading by the use of a power shovel or like equipment.

Another object of the invention is to provide an improved machine of the above character adapted particularly for use with a bowl having a hinged bottom which swings upwardly and forwardly for a load discharge operation.

Another object of the invention is to provide a novel arrangement of operating cables and sheaves which will provide an open top bowl.

Additional objects of the invention will appear from the following description in which the preferred embodiments have been set forth in detail in conjunction with the accompanying drawing.

Referring to the drawing:

Figures 1A and 1B, taken together, form a side elevation in section illustrating a machine incorporating the present invention,

Figures 2A and 2B, taken together, form a plan View of the machine illustrated in Figures 1A and 1B.

Figure 3 is a cross-sectional detail on an enlarged scale taken along the line 33 of Figure 1B.

Figure 4 is a cross-sectional detail taken along the line 4-4 of Figure 1B.

Figure 5 is a cross-sectional detail on an enlarged scale taken along the line 5-5 of Figure 1A.

Figure 6 is a cross-sectional detail taken along the line 6-6 of Figure 5.

Figure 7 is a plan view of a portion of the machine including the main bowl, partly in cross section, and illustrating the return springs for applying force to return the hinged bottom to load carrying position.

In general my machine consists of a main bowl A, in conjunction with the front bowl or apron 2 B. The bowl, together with the front apron, is carried by a frame structure including the yoke C, which is carried by wheels as will be presently described.

The main bowl includes the side walls Hi (Figure 2B) which are fabricated together with the rear beam extensions H. The rear ends of the side walls H) are connected by the cross beams i2 and I4 (Figure 1B) which in turn are connected by the vertical beams I3. The intermediate portions of the beams I3 are connected by the short cross beam I5. The beams H are attached to the axle structure l6, which serves to mount the wheels ll. Between the wheels ii there is a frame structure I 8 which will be presently described in detail.

The forward portions of the side walls II are connected by the beam 2! which forms a convenient mounting for the cutting blade 22.

The main bowl expeller 23 (Figure 1B) in this instance is of the hinged type, and has its forward edge hinged at 24 to the beamZ l. The one portion 23a of the expeller forms a bottom supporting surface for the load while the upper portion 231) forms the rear wall of the bowl. The intermediate portion 230 is curved as illustrated. As illustrated in Figure 1B the expeller 23 is in load carrying position. To discharge a load over the cutting blade 22 the expeller is swung up- I portion 26 (Figure 1A) which is fabricated for suitable strength and which is rigidly attached to the side arms 21. These arms extend rearwardly along the side walls IU of the main bowl, and are pivotally attached to the same at 28. Load retaining side wings 29 overlap the forward edges of the main bowl and are secured to the sidearms 2! and to the structure 26. With the arrangement just described the apron B can be raised to permit discharge of material from the main bowl, partially closed during loading operations, or closed for carrying a load to a point of discharge.

The frame C is in the form of a yoke including the sidearms 3| and the forward cross-connecting beam 32 (Figure 1A). A gooseneck 33 is attached to the center of the beam 32 and extends to the king pin assembly 34 of a suitable tractor unit (not shown). The king pin assembly and tractor unit may be of the type disclosed in Clarke 2,368,202.

The forward ends of the side walls in for the main bowl have forward beam extensions 35 which have their ends cross-connected by beam 38 (Figure 1A). The rear extremities of the side arms 3| of the yoke C are pivotally connected at 31 with the sidewalls In of the main bowl. The net effect is to form a jack knife arrangement between the main bowl and the yoke C. By the application of cable operating means to be presently explained, jack knife movements between these structures are employed to raise or lower the main bowl with respect to the yoke -C.

At the rear of the machine novel means are provided for operating the expeller "23. Thus the rear axle assembly includes a beam 4|, which is attached to the cross beams l2 and I4 by the structural members 42 and 43. A longitudinal beam 44 is seated within the beam 4!, and has its forward end secured to the cross beam 13. The rear end of beam 44 carries the pusher or bumper member 46, such as is generally provided on earth moving scrapers.

The forward end of the beam 44 carries a roller 41 (Figure 1B) and the sides of the beam are formed to provide the arallel guide channels 48 (Figure 3). A traversing beam 49 (Figure 1B) is disposed above the beam 44, and has its rear end provided with rollers (Figure 3) which track within the channels 48. The inner side of the top wall 52 of the beam '49 forms'a trackway for the forward roller 41. The traversing beam also carries a ridge 53 extending longitudinally down the top of the same and this ridge engages a grooved roller 54 which is carried by the cross beam l2.

Within the pusher beam 49 there is a rear sheave mounting 56, which serves to mount the cable sheaves '5'? and 58, and which can be fixed to the side walls of the beam as shown in Figure 3. Within the forward end of the beam there is another sheave mounting 59 which serves to carry the cable sheaves 6| and-62, and which is fixed to the frame beam 44. By a reeving arrangement which will be presently described an operating cable is engaged with the sheaves carried by the beam 44 and the pusher beam 49, whereby the pusher beam can be traversed forwardly to operate the expeller 23.

The forward end of the beam 49 mounts a pair of rollers 61, which engage the adjacent exterior I anchor plate 69, which is mounted upon the central portion of the crossbeam 14. The outer ends of these springs have a clevis attachment H to the ears 12, which are mounted upon the side edges of the expeller 23. When the expeller is swung upwardly and forwardly the springs 68 are elongated, and after discharge of a load and slackening off of the operating cable, the springs return the expeller to original load carrying position.

A load retaining wall 13 is shown mounted upon the crossbeam I2 in order to minimize spill of load over the top of the expeller 23, during loading operations. The operating cable "ill has its one end anchored to the frame by suitable means (not shown) and reeved over the sheaves 51, 58,

formed to provide a compartment 19, which serves to house a plurality of sheaves and blocks. Thus the traveling block 8| is slidably mounted upon the guideways 82, and operates in conjunction with a stationary block 83. An apron operating cable 84 is attached to the block SI and engages over the sheaves 86, 81 and 88 (Figure 2A) to extend from thence downwardly for attachment at 89 to the apron B. Sheave 88 is carried by the stud beam 9| which is mounted upon the cross beam 32.

The cable H3 which extends from the rear of the machine'to the forward sheave I8, is reeved through the sheaves of the blocks 84 and 83. As it extends from these blocks it engages the sheaves 92 and 93, and from thence extends forwardly over sheave 94 and the fairlead sheave S6 to a winch'drum carried by the tractor.

The cable 97 for raising and lowering the main bowl with respect to the frame C is likewise connected to a winch drum and extends rearwardly over the fairlead sheave 98, sheave 99 and sheave I01 which is carried by the stud beam'9l. From sheave IGI the cable 91 extends downwardly and is reeved over the sheaves of the blocks I02 and I03, to be finally anchored to the beam 32.

Operation of the machine'described above is as follows: When the cable 9'! is pulledor played out by the winch drum to which it is attached, the main bowl and cutting blade 22 are raised -or lowered to a desired position. When the cable Iii is pulled or played out, one controls the operation of both the apron B and the expeller 23. Assuming a starting position in which the apron is in its lowermost position and the expeller is in its loading position as illustrated in Figure 1B, then upon initial takeu of the cable 10 the apron B is first raised, since it offers less resistance to movement than the beam 49. While the apron is in partly raised position the machine may proceed to take on a load by forward movement accompanied by a lowering of the cutting plate 22 into the earth formation. When the bowl has been fully loaded, the apron B is dropped back to closed position by playing out the operating cable '10, and at the same time the main bowl is raised to carrying position. When it is desired to discharge a load the cable 10 is again taken up and raising of the apron serves'to discharge the load from the forward part of the bowl. When the apron reaches the limit of its upward movement, further takeup of the cable causes movement of that part which extends over sheaves i8, 15 and '14 whereby the reeving between sheaves 51, 58 and 6|, 62 causes sheaves 51, 58 to be moved forwardly. This causes the beam 49 to move forwardly with sheaves 51, 58, with the result that the rollers 68 act upon the exterior surface of the expeller to force the expeller upwardly and forwardly. After the load has been fully discharged the operator plays out the operating cable iii, and springs 68 return the expeller to load carrying position, after which the apron returns to its lower position.

A novel feature of the present invention is the mechanism used for operating the expeller 23,

and the cable arrangement employed with this mechanism. The mechanism is relatively simple in construction and is capable of transmitting the required forces to the expeller for discharging a load. Likewise this mechanism, together with the cable arrangement extending to the same, leaves the upper part of the main bowl completely open for direct loading by the use of a power shovel or the like. The sheaves which are associated with the beam it are protected from falling earth or rock and in general the mechanism is capable of withstanding the severe services to which earth movers are commonly subjected.

I claim:

1. In earth moving equipment of the type including a wheeled frame serving to carry a main bowl, the bowl having a forward digging blade adapted to be moved over the ground to take on a load, an expeller carried by the main bowl and having hinged movement between load-carrying and discharge positions, a horizontal expeller operating beam disposed to the rear of the bowl, said beam extending rearwardly from said expeller and longitudinally of the frame, said beam being formed to provide an upper longitudinal ex tending wall and laterally spaced parallel side walls, means serving to track the rear end of said beam on said frame for horizontal movement of the beam in opposite directions longitudinally of the machine, roller means carried by the forward end of the beam and adapted to ride upon the adjacent surface of the expeller, a pair of rollers carried by the frame and engaging the upper and lower sides of said wall in a region near the forward end of the beam when the beam is in its rearmost osition, sheave blocks carried by and within the rear end portion of said beam, sheave blocks carried by the frame, said last named blocks being disposed to underlie the top wall of the beam between said side walls and also being disposed within the forward end of said beam when the latter is in its rearmost position, and a cable reeved upon the sheaves of the blocks whereby when the cable is pulled the beam is moved forwardly to move the expeller to load discharge position.

2. In earth moving equipment of the type including a wheel frame and a main bowl carried by the frame, the bowl having a forward digging blade and adapted to be moved over the ground to take on a load, an expeller carried by the bowl and having hinged movement between load carrying and load discharge positions, a hollow expeller operating beam disposed to the rear of the main bowl and extending rearwardly of the expeller, said beam being horizontal and extending in a direction longitudinally of the machine, said beam including depending side and top walls, a horizontal beam carried by the frame in a position directly below said operating beam, whereby a generally enclosed space is formed between said frame beam and the side and top walls of the expeller beam, guideways formed by the sides of said frame beam, rollers carried by the rear end of said operating beam and tracking in said guideways, a pair of vertically aligned rollers carried by the frame and engaging the upper and lower surfaces of said top wall of the operating beam in a region near the forward end of the beam when the beam is in its rearmost position, roller means carried by the forward end of the operating beam and adapted to ride upon the adjacent surface of the expeller, sheave blocks carried by the rear end portion of said operating beam within said enclosed space, sheave blocks carried by the frame beam within said enclosed space and adjacent the forward end of the operating beam when the latter is in its rearmost position, and a cable reeved upon said sheaves whereby when the cable is pulled the beam is moved forwardly to force the expeller to load discharge position.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,345,313 Armington et al Mar. 28, 1944 2,383,978 Le Tourneau Sept. 4, 1945 2,394,483 Rockwell Feb. 5, 1946 2,406,826 French et a1 Sept. 3, 1946 2,514,053 Gurries et a1. July 4, 1950 2,573,765 Gustafson Nov. 6, 1951 

